Air Dryer
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- เผยแพร่เมื่อ 23 เม.ย. 2013
- Learn the basic parts of an air dryer and how they function as well as how to properly install one in your air brake system.
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Product in this video:
Air Dryers: goo.gl/zqXYcB
Air Dryer Components: goo.gl/zqXYcB - ยานยนต์และพาหนะ
Thank you for this good explanation....now I know what my mechanic was talking about when he told me that it could be the governor and told me to remove the middle line(control line) to check that first.
Shoutout from TAT Express out of Hutchins, TX
Wow great vid. I am from south Africa. Being in the AB business for 30 years. I always swopped out the sd9 air dryers when we were stuck on road side with wabco air dryers. We disconnected the governors valve . It will ensure the heads stay under pressure at all time. My personal feeling is that its better to keep the load on rather than free flow the head valves at purge.
Can you explain more about disconnecting the governors valve is that another option instead of a 4 airline dryer
Good information thanks body.
Dude, your videos are awesome you saved my ass. Thank you!
Glad to hear it was helpful!
Thank you!
excellent information share
I have a couple questions. Some over a year ago I installed a reman Cummins compressor. The old comp was wore out. Ever since installing new comp it has pumped oil. Not all the time but most of the time. I have owned this truck for 13 years and it has always had a 3 line dryer. After watching your video I am wondering if this comp I installed should have a 4 line dryer? Also should the discharge line between comp and dryer be as short as possible within reason? Thank you.
Is the compressor on your truck a QE cummins compressor? If so, a QE compressor requires a 4-line dryer. We recommend that the discharge line be 10-12 feet in length with no loops in the line.
I was told years ago to always stay clear of that purge valve when under the truck that It could hurt you severely if under it while servicing like greasing or doing other maintenance . Since they could go off at moment. When you least expect it. Is this true?
Thanks for a great video!
If the truck is not running there should be no issues. If the truck is running, the dryer will purge out air and grit from the system.
Great video thanks 👍
Your welcome glad to hear it was helpful to you!
COME ON GUYS LETS GET SOME MORE AWESOME CONTENT!!!!!
Finally.a person that speak good English
now what we are looking for is someone that can properly construct an English sentence Gregory I.E. finally a person that CAN speak good English OR finally a person that SPEAKS good English.....
Thank you. Has any harm been done to the compressor other than the fact it has been pumping oil?
There should be no harm done to the compressor, it should just clean itself up once the 4-line dryer has been installed.
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Thanks for the informative video. I have a school bus that won't pressurize the wet tank. The purge valve dumps but also hisses and spits white. Does this need addressed and or my governor? Haven't educated myself on unloaders yet.. Thank you for all
Check the supply line going from your compressor to your dryer and make sure there are no low spots and no loops in the line. The line should gradually drop from the compressor to your dryer. If there are any low points, condensation could be building up in the line. If your compressor is pumping oil it will mix with the condensation creating the white soot you speak of..
@@fleetproducts I found that there was a clogged drain valve in my wet tank. It does build pressure all along..
The issue now is air leaking when emergency brake released and foot on the brake. The treadle valve exhausts and there's leaks at both front cans it seems...
If dry keep building air to 145 and don't purge and air kick out emergency release Val to bring air pressure down what's the problem?
Hey well I wish I found your video earlier dealer took 2 days to find out what part number my Air dryer was since it has a 4 th port. I checked my air compressor and yes it had a qe on it. The difference here in Canada price wise is 160 cad for the standard 3 port bendix and the one for the 4 port is a whopping 650 cad dollars. Is there anyway I can change to a 3 port, my air dryer looks ancient and I don't think just changing the filter is enough. Your feedback would be greatly appreciated. Thx
You are going to need the 065647 dryer with the 4th line to maintain head pressure in your QE compressor. Give our parts department a call at 877-243-0442 and I am sure we can get you a 4th line dryer for a much better price that you were quoted by the dealer.
are all governors located on the compressor or can they be found on the air dryer assembly too ?
The air governor can be remote mounted on the eng. or firewall if clearance is a problem.
Question: can i hook this dryer to battery and install a kill switch for 12v power?
Sure you can use a battery as it runs on 12 volts. Just remember the heater in an air dryer is thermostatically controlled so it only comes on when the temperature is below 32°.
For towing sake, is it better to go to the compressor or dryer? Which port do you supply air to on dryer?
Sorry I am not sure what you are asking in regards to towing.For the dryer, there is a "supply" port and a "delivery" port and these ports should be marked in the casting.
Have a question.
On my 1995 HR Imperial, with Cummins 8.3 diesel engine. Spartan chasis.
Have a Haldex Pure Air Plus Air Dryer.
Those smaller lines for the purge, on my it has nuts, that i already took off, but the line is still there. Do i pull the line out?
First time changing that part. Not enough $ to get to the shop.
Any advice would be appreciated.
Thanks for sharing. May God keep you blessed.
I am assuming the line is corroded in? If so, spray it with some WD-40 and let it sit for a bit then try to pull it off. You may need to change the line if it is too far gone. Hope this helps.
@@fleetproducts
Thanks. Already out.
By any chance do you know where i can buy the same part.
i think the part num is QD6026
The Spartan manual, says that the Bendix AD-9 and Midland N4245H are compatible.
Can't find any, of those.
If you have any link, or address so i can buy it, will be well appreciated.
Thanks for the tutorial btw.
@@1alopezpr We do not stock the DQ6026 but we do have the AD-9 dryer available. You can give us a call at 877-243-0442 and someone will be able to help you out.
With discharge line stays filled all the time. Compressor is NOT as You state under load all the time.But cycles between pumping new air or playing like a spring qith the same air.( this way constant head presure seals the rings)
Overal gread video.
Dont use SS1200P but instal extra controll valve KN23500 or mount ss1200E with QE or Q cpmpressors
Hello, I have a 98 ford f800 with a Cummins 5.9 12 valve engine with air brakes, and mine didn't come with a Air dryer, it has pull cords on tank to manually bleed tank daily , and my question is if it didn't come with it should I install one (if possible) or should I leave it like it is? thanks
You install an air dryer to help clean up oil and moisture from your air system. If you are in a colder climate, we recommend that you install an air dryer.
Quick question, I have air back feeding from my control port, would this mean I need to replace the valve or could something else be the problem (2015 Mack)MP8
I would suggest to replace the valve. It is most likely the cause of your issue.
Hi, can you replace a System Saver 1200 air dryer with the AD-9 air dryer in your video? Is it compatible with a 2000 Cummins ISX? Lots of moisture in the system, even after installing a new air dryer. (System Saver 1200) Thanks!
You have 2 options. You could install the longer desiccant cartridge (950048-G3) on your SS1200 air dryer to increase the drying capacity or you can replace it with the AD-9 air dryer (109685-G). Note that the AD-9 air dryer is frame mounted.
Fleet Products Ltd. thanks for your reply. I’ll keep you posted.
Any idea what a part number would be to get the fourth line? I cannot find it anywhere.
The part # would be 065647.
nice
Sorry for not getting back to you sooner. My air compressor tag says midland, reman by haldex. Part# 3558072X. Serial# 21515. I'm guessing this is not an E Q and I just got a poor rebuild. Your comment is appreciated.
That is indeed a QE compressor so you will need to have a 4-line dryer installed to maintain the head pressure in the compressor.
What should we do if air dryier direct release air
2003 Pete cat motor had the Compressor replaced the original was a bendix replaced with haldix problem is it takes a long time to air up and after shutting the truck off it looses all air in both tanks checked all lines no leaks Compressor is putting 150 psi is it possible the lines are crossed at the drier????
What model and kind of air dryer do you have? Is the truck in a warm shop where no ice or cold is effecting the air brake system?
#1 - The compressor should only pump 125-130 psi, 150 psi is way too high. Something must be wrong with the governor.
#2 - Do you hear any leaks anywhere in the truck? If the air tanks are draining that would tell me you have a dryer problem because the check to keep the tanks full is in the dryer. If the compressor is slow, I would change the discharge line from the compressor to the air dyer as it is very likely restricted.
I realize this video is old but I am looking for some help with a air dyer
So it's actually on a car a low rider there is serious problems with water in the suspension air it currently has no air dyer at all its running a York ac compressor converted to pump air that has a eletric clutch and switches in the tank it comes at under 120 psi off at 140 psi im wondering if there is a way to install a truck air dyer maybe a 3 line style but the system is eletric no air governor just not sure how to run the control line to make it purge
All of our dryers require a governor so that the dryer will unload in the unload cycle and then charge in the charge cycle. If you google electric air dryers, there are options available with the electric expello valve to purge the water. Our truck dryers will not work.
How do I determine if I have a Q E compressor? Thanks
If you do not know what a QE compressor looks like, you will need to see if you can find a tag with the part # on the unit. You can then determine if it is a QE compressor or not.
That check valve gets alot of gunk build up as well that will create problems
Can it be cleaned or should I just replace the whole unit? My air purges as if I have an air leak but I don't. 98 Series 60 12.7.
Thank you
Whats the best way to know for certain that the compressor is toast?
I am commenting in desperation. My wabco dryer on my series 60 in my freightliner will not purge. This is Inspite of changing purge valve twice , changed governor and changed the valve which directs the inbound air just inside where the main hose connects to the dryer. Is it possible that the small air leak on the tube on top of my compressor is preventing purging? Any good advice would be very appreciated. Thank you
@@robertrinaldi8748 with the engine off grab som fittings that wont leak and put 120 psi on the line from the gov to the compressor and from the dryer to the compressor.
If they are leaking replace them. Is the gov at the dryer or compressor?
The big line from the compressor goes first to the dryer. Disconnect it from the dryer.
You might need an unloader kit in the compressor but fix the leaks first. Use soap in a spray bottle to find leaks. If the gov is on the dryer you can air test that line with the truck running. Soon as the gov kicks on and sends air to the unloader valve in the compressor that long air line becomes pressurised and should bubble if its leaking once the air reaches 120 or wherever your system pressure tops out.
@@RC-Heli835 Thank you so much for your advice. You have confirmed that an air leak in a hose may cause the problem. In that case I am now pretty sure why it's not purging. There is an air leak on a metal tube right on top of the compressor. I will have to get that fixed for sure. Thanks again. I really do appreciate the information and advice.
What if the dryer is doing what it suppose to do but some how the trailer gets air from the truck but while driving the trailer starts to send air back to the truck.
Check that you tractor protection valve is functioning properly as it may be defective if air is being sent back to your truck.
Hi
Good morning,
Can you me some information The dryer control line not deliver the air to the Governor control valve. Please advise control port will deliver the air to governor creation pressure or all the time. Replace new dryer & new air compressor still it is same in IPC all time air low message on & beep sound comes on . Vehicle Details,MACK Truck with Vulcan V70 Wrecker Conversion, Model -2009
Are you sure that you have plumbed the governor properly? Take a look at the governor video on our channel for further instruction. Here are a few other things you can check: 1. The check valve between the dryer and first tank may be restricted. 2. If there is an excessive bend in the discharge line, oil turns to carbon in the line and can cause a restriction.. 3. Water freezing between the compressor and the first tank can also cause a restriction. These are a few things that can cause your system to not build air pressure.
So I have a Haldex air dyer the problem is.... purge's to long. Purge valve does not purge quickly it is slow and drains off 20-25psi off the primary. New dryer kit, new D-2 governor and new unloader kit on a compressor that is only 3 yrs old . . . why and where should I be checking?
When the dryer purges, it has to empty all of the air in the dryer and the discharge line coming from the compressor to the dryer. The length of time can vary from truck to truck. However, if the check valve in the dryer is leaking, then the purging will not stop. The air will continue to flow through to the purge valve. Check to make sure it is not leaking. A one-way check valve in the primary air tank is a good idea as well to keep the air system tight.
Is it hard to add a dryer to a truck that dont have one?
It should not be that difficult. You would need a new dryer and a few lines to connect the dryer to the governor and air tank.
have a dd s 60 4 line on air dryer. cant get parts . putting on a 3 line system. main from compressor one fro gov and one to same tank . Willnt build air.
If you are running a Cummins/Holset QE or E type compressor, it requires a 4-line AD-9 style dryer. QE or E type compressors must be installed in conjunction with a 4-line dryer so the compressor will not pass oil into the air system. The 4-line dryer maintains pressure in the discharge line while the compressor is unloaded or an e-con valve and check valve must be used in the system.
If you want to get away from the AD-9 style dryer, you could also install a Turbo 2000 dryer as this has a build in e-con valve internally. We have parts available if needed. Give us a call.
A complete replacement of all types of air dryers on vehicles/equip is the ClearDrain System. It is solid-stat;, self-cleaning, self-defrosting, self-lubricating & self-regulating - dessicant free & weighs just 7.2 lbs installed. Only (4) connections, fittings are stainless steel & brass - temp range is -100 to +185F. USA made & has (5) year unlimited hour/mileage non pro-rated warranty. It protects compressors from backpressure caused by dryers so no more carbon affecting the Reed valve. Check it out online - ClearDrain System.
?? You think- ClearDrain System? You have nothing to remove moisture from the air.. You still have 100% saturation.. you need physical media to remove moisture and oil. You either super cool the air or desiccant... what hog wash.. Carbon on the reed valves is either soot in the oil above 4.5%.. excessive glycol in the oil above 50ppm or excessive heat at the piston fire deck above 450F . Excessive back pressure from the dryer (above 20 PSI delta P sup to del) will create carbon at the inlet fitting of the dryer.. You guys better go out and do your homework..
I've got 3 line Wabco air dryer, 2015 Volvo VNl, D13 engine... dryer constantly purging, (every 15 seconds.)...constant , slow air leak from purge valve....replaced both, air compressor and air dryer, brand new, thinking the problem will go away... no luck... still purging every 15 seconds... any help please.
P.S. system doesn't have an air governor, all controlled by dryer ...
I would suggest you add a governor to the system as that is what tells the compressor when to pump air. Secondly, check your lines to make sure there are no leaks.
@@fleetproducts I'm going to add one, cuz this is annoying... QUESTION... What do I do with Dryer control line, the one that sends signal to air compressor unloader...
@@garysargsyan4998 Please watch the video on our channel regarding D-2 governor installation.
Check the check valves as well for oil gunk buildup as that could allow air bleed back thru the compressor and to atmosphere ( or in the case Volvo air will bleed backout thru the unloaded compressors into the engine bc of the way it's plumbed off the intake tube for the turbo inlet into the engine)
I have an issue i need help
98 379 have a haldex 3558072x air compressor and a 65647x air dryer when i achieve 125 and the valve at the nottom of the air dryer purges it dosent close back up i keeps purging please help
I would check to make sure that your governor is plumbed correctly. If it is, you may have an issue with the unloader in the compressor.
@fleetproducts found it thanks I had one of the plugs in the incorrect place wouldn't allow the air governor to function properly
@@kevinhayes1620 Excellent glad to hear you were able to resolve the issue.
so what happens if you have a 3 line air-dryer & it doesn’t purge at all?
Maybe you have a faulty governor as the governor is what sends the signal to your dryer to purge. I would say it is the governor or you have a faulty purge valve in your dryer.
@@fleetproducts thank you sooo much! I was abt to spend $900 on a dryer but I changed the governor. $16 bucks brand new at the Kenworth dealership! It fixed my problem! Thanks again!
@@joe02323232 Awesome Joe! Glad to hear!
What is the model with the 4 lines called
It is a model 9 4-line dryer. Part # is 065647-G.
i cant tell if my reman haldex air comp is qe the part number is 3018543x... getting white nasty stuff in the air dryer
Your compressor is not a QE. If you have white soot in your dryer, make sure your alcohol evaporator is plumbed between your air tank and your air dryer, not after your air dryer.
@@fleetproducts if its plumbed between the the air dyer and the air tank it would be after the air dryer... i currently do not have an achohol evaporator...ur opinion should i install one?thanks for the advice
@@nightcrawler1 After further discussion with our technician, he said to take a look at your discharge line going from your compressor to your dryer. This discharge line should be between 10 - 12 feet long and there should be no loops in the line. It should slope downwards to your dryer so that the condensation that is building up can be purged out of the dryer. There is no need to install an alcohol evaporator unless you are in a colder climate.
@@fleetproducts yes i did loop the hose from the compressor... i will change that thank you so much
Why is air dryer directly release air.
I think the air dryer dumps air because its such a convenient place.
why did this get 7 thumbs down? classic trolling 😂
Because he totally ignored the electrical connection to the dryer...
Probably the stupidest question. If its all mechanical then why is there an electrical plug?
The plug on the dryer is for the wiring harness.
You would not need it to operate. The wire harness is strictly for heating up the element inside the purge valve so it does not freeze up in cold temperatures.
Fleet Products Ltd. Ok, thanks. Ideas of a particular compressor to use?
That would all depend on how much CFM you are looking for.
Fleet Products Ltd. All id require is a small 8 CFM, but more is perfectly fine. Just means i can run multiple air tools at once.